Error Code Wiki

400 Bad Request

Published in Networking.

The 400 status code, or Bad Request error, means the HTTP request that was sent to the server has invalid syntax.

Here are a few examples of when a 400 Bad Request error might occur:

  • The user’s cookie that is associated with the site is corrupt. Clearing the browser’s cache and cookies could solve this issue
  • Malformed request due to a faulty browser
  • Malformed request due to human error when manually forming HTTP requests (e.g. using curl incorrectly)